<template>
  <div class="goods-image">
    <div
      class="large"
      v-show="show"
      :style="[{ backgroundImage: `url(${images[currIndex]})` }, largePosition]"
    ></div>
    <!-- 中图 -->
    <div class="middle" ref="target">
      <img :src="images[currIndex]" alt="" />
      <div v-show="show" :style="layerPosition" class="layer"></div>
    </div>
    <ul class="small">
      <li
        v-for="(img, i) in images"
        :key="img"
        :class="{ active: i === currIndex }"
      >
        <img @mouseenter="currIndex = i" :src="img" alt="" />
      </li>
    </ul>
  </div>
</template>
<script>
import { ref } from "vue";
import {useGoodsImage } from "@/hooks/goods"
export default {
  name: "GoodsImage",
  props: {
    images: {
      type: Array,
      default: () => [],
    },
  },
  setup(props) {
    const currIndex = ref(0);
    // 控制遮罩层
    const show = ref(false);
    // hooks 封装
    const target = ref(null);
    /**
     * 封装大图图片逻辑
     * params {target,show} target 进入的ref  show 控制的layer层的显示
     * return largePosition layerPosition
     */
    const {layerPosition,largePosition} =useGoodsImage(target,show);
    
    return {
      currIndex,
      largePosition,
      layerPosition,
      show,
      target,
    };
  },
};
</script>
<style scoped lang="less">
.goods-image {
  width: 480px;
  height: 400px;
  position: relative;
  display: flex;
  z-index: 500;

  .large {
    position: absolute;
    top: 0;
    left: 412px;
    width: 400px;
    height: 400px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    background-repeat: no-repeat;
    background-size: 800px 800px;
    background-color: #f8f8f8;
  }

  .middle {
    width: 400px;
    height: 400px;
    background: #f5f5f5;
    position: relative;
    cursor: move;

    .layer {
      width: 200px;
      height: 200px;
      background: rgba(0, 0, 0, 0.2);
      left: 0;
      top: 0;
      position: absolute;
    }
  }

  .small {
    width: 80px;

    li {
      width: 68px;
      height: 68px;
      margin-left: 12px;
      margin-bottom: 15px;
      cursor: pointer;

      &:hover,
      &.active {
        border: 2px solid @xtxColor;
      }
    }
  }
}
</style>
